利用STM32单片机驱动mfrc522,芯片使用STM32F103RCT6，经测试稳定可靠。-Use STM32 microcontroller drive mfrc522，经过测试稳定可靠，STM32F103RCT6，A direct connection can be used to board，Do not understand where you can leave a message, I will reply as soon as possible。